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HomeMy WebLinkAboutNC0088366_NPDES Permit Mod_20100407NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly'Eaves Perdue Coleen H. Sullins - Dee Freeman Governor : • Director Secretary Mr. Steve Ward Harnett County Public Utilities P.O. Box 1119 Lillington, North Carolina 27546 April 7, 2010 - Subject: Issuance of NPDES..Permit Modification Permit No. NC0088366 South Harnett County Regional WWTP Harnett County Dear Mr. Ward: • Division personnel -have reviewed and approved your application for issuance of the subject permit. Accordingly, we are forwarding the attached Modified 'NPDES discharge permit. This permit _is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of, Agreement between North Carolina and the U.S. Environmental ' Protection Agency dated October 15, 2007 (or as subsequently amended). There are no changes in this final permit from the draft permit sent to you. If any parts, measurement frequencies or sampling requirements contained in this permit are - unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to. Chapter 150E of the North Carolina General Statutes,and filed with the Office of :Administrative Hearings (6714 Mail Service Center, Raleigh; North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. 1617 Mail Service Center, Raleigh, North Carolina.27699.1617 Location: 512 N. Salisbury St. Raleigh, North 'Carolina 27604 • Phone: 919-807-63001 FAX: 919.807-64951 Customer Service: 1-877-623-6748 Internet www.ncwaterquality.org An Equal Opportunity 1 Affirmative Action. Employer NonrthCarolina 7atura!!j Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Jim McKay at telephone number (919) 807-6404. CC: Sincerely, ' Coleen H. Sullins Fayetteville Regional Office/Attn: Belinda Hinson Central Files NPDES File Aquatic Toxicology Attn: Susan Meadows - via. email Environmental Sciences Section, Attn: Jennie Atkins - via. email EPA Region IV - via. email. Marziano & McGougan, P.A./ 147-A Dublin Square Road/ Asheboro, NC 27203/ Attn: Mr. Brian Sexton, P.E. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-6300 l FAX: 919-807.6495'. Customer Service: 1-877-623-6748 Internet: www,ncwaterquatity.org Nne orthCarolina 7ahira/Ili Permit NC0088366 STATE ,OF. NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE', NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards andregulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Harnett County Public Utilities. is hereby authorized to discharge wastewater from a facility located at the South Harnett Regional WWTP Shady Grove Rd. _ SR 2050'' Spring Lake Harnett County to receiving waters designated as the Little River in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective May 1, 2010. This permit and authorization to discharge shall expire at midnight on May 31, 2011. Signed this day April 7, 2010. oleen H. Sullins, Director 0( Division of Water Quality By Authority of the Environmental Management Commission Permit NC0088366 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. Harnett County Public Utilities is hereby authorized to: 1. Continue to operate a 5.0 MGD wastewater treatment facility consisting of the following components: • Headworks including an automatic fine screen with manual bypass, vortex grit chamber, influent composite sampler, and flow splitter ,box, • Intermittent continuous extended aeration system including dual 126-ft by 174-ft basins providing a total volume of 4,728,000 gallons, three 2,300 scfm blowers, fine bubble diffusers, and five 25 hp submersible mixers • Surge tank • Three 12.5 -ft by 52-ft traveling bridge filters • Dual channel UV disinfection system • Cascade aerator with Parshall flume and effluent composite sampler • A sludge management system consisting of three 300 gpm sludge return pumps, an aerated sludge holding basin with a capacity of 802,000 gallons, including a 2,692 scfm membrane disc aeration system • A lime addition system including two 7.5 hp submersible mixers • A standby electrical generator 2. After receiving an Authorization to Construct, to construct, and after submitting an Engineer's Certification, to operate a 15.0 MGD wastewater treatment facility consisting of the following components: • The above listed 5.0 MGD wastewater treatment facility, plus: • Dual intermittent continuous extended aeration systems with each system including dual 126-ft by 174-ft by 18-ft depth basins providing a total aeration volume of 5.90 MG, a 1.30 MG surge tank, fine -bubble diffusers, decanter, five 25 Hp submersible mixers, and four 2,300 scfm blowers • Dual tertiary traveling bridge filters, with three 12.5-ft by 52-ft units each • Dual channel UV disinfection system, with each channel capable of treating a peak flow of 12.5 MGD, • A sludge management facility expansion including a 2-meter gravity belt thickener rated at 900 dry pounds/ hour, a 2.2 meter sludge filter press rated at 2,041 dry pounds/ day with sludge feed pump, screw conveyers, Class A residuals heated vessel rated at 2,000 pounds/ hour, lime storage silo and delivery system, and an odor control system • A 1,000 KW emergency generator Located on Shady Grove Rd, Spring Lake, in Harnett County. 3. Discharge from said treatment works at the location specified on the attached map into the Little River, classified as C waters in the Cape Fear River Basin. Permit NC0088366 Harnett County Public Utilities — South Regional WWTP Perrnit NC0088366 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL During the period beginning on the effective date of the permit and lasting until expiration, or expansion above 5 MGD, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: Effluent Characteristics Discharge Limitations . Monitoring Requirements Monthly Average Weekly.' Average - Daily Maximum Measurement . Frequency... • Sample • Type Sample Location1 Flow 5.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 200C (April 1— October 31) 2 5.0 mg/L 7.5 mg/L Daily Composite Influent and Effluent BOD, 5-day, 20°C (November 1— March 31) 2 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent Total Suspended Solids 2 30,0 mg/L 45.0 mg/L Daily Composite Influent and Effluent NH3 as N (April 1— October 31) 1.0 mg/L 3.0 mg/L Daily Composite Effluent NH3 asN (November 1 — March 31) 2.0 mg/L 6.0 mg/L Daily Composite Effluent Dissolved Oxygen 3 Daily Grab Effluent Fecal Coliform (geometric mean) 200/100mI 400/100m1 Daily Grab Effluent Total Residual Chlorine 4 28 pg/L Daily Grab Effluent Temperature • Daily Grab Effluent pH 5 Daily Grab Effluent Total Phosphorus Monthly Composite Effluent TKN Monthly Composite Effluent NO2 + NO3 Monthly Composite Effluent Total Nitrogen Monthly Calculated Effluent Chronic Toxicity 6 Quarterly Composite Effluent Temperature 7 See Footnote 1 Grab - Upstream & Downstream Dissolved Oxygen 7 See Footnote 1 Grab Upstream & Downstream Effluent Pollutant Scan a Annually Composite Effluent : see next page Permit NC0088366 NOTES for A.(1) 1. Upstream = at least 50 feet upstream of the discharge. Downstream = at least 500 feet from the discharge. Stream samples shall be collected three times per week during the months of June, July, August, and September and weekly during the remainder of the year. 2. The monthly average effluent BOD, and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The daily average dissolved oxygen concentration as measured in.the effluent shall'not be less than 5.0 mg/L. • 4. TRC monitoring and limit requirements apply only if chlorine or chlorine derivative is used in the treatment process. If chlorine or chlorine derivative is used for disinfection, the Fayetteville Regional office must be notified in advance. The facility shall report all effluent TRC values reported by a NC certified laboratory, including field certified. However, effluent values below 50 ug/ L will be treated as zero for compliance purposes. 5. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. 6. Chronic Toxicity (Ceriodaphnia) limit at 15% with testing in January, April, July, and October (see Special Condition A. (3)). 7. Instream sampling (Upstream and Downstream monitoring) is waived as long as the Permittee retains membership in the Middle Cape Fear River - Basin Association (MCFRBA), which is conducting a coordinated instream monitoring effort. If the Permittee's membership in the MCFRBA is terminated, the Permittee must immediately notify the Division in writing, and the instream monitoring requirements specified in this permit shall be reinstated immediately. 8. See Special Condition A.(6) There shall be no discharge of floating solids or visible foam in other than trace amounts. Permit NC0088366 A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning on the submission of an Engineer's Certification and lasting until expiration, the Permittee is authorized to discharge treated 100% domestic wastewater from Outfall 001.Such discharges shall be limited and monitored by the Permittee as specified below: . Effluent:. _ -. • Characteristics •. - : - Discharge Limitations-", .. Monitoring Requirements. Monthly Average- Weekly.: Average.. .:. Daily . Maximum Measurement_ Frequency. .. ' Sample- • Type Sample Location 1 - Flow 15.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 200C (April 1— October 31) 2 5.0 mg/L 7.5 mg/L Daily Composite Influent and Effluent BOD, 5-clay, 20°C (November 1— March 31) 2 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent Total Suspended Solids 2 30.0 mg/L 45.0 mg/L Daily Composite Influent and_Effluent NH3 as N (April 1— October 31) 1.0 mg/L 3.0 mg/L Daily Composite Effluent NH3 asN (November 1— March 31) 2.0 mg/L 6.0 mg/L Daily Composite Effluent Dissolved Oxygen 3 Daily Grab Effluent Fecal Coliform (geometric mean) 200/100m1 400/100mI ' Daily . Grab Effluent Total -Residual Chlorine 4 28 pg/L Daily Grab Effluent Temperature Daily Grab Effluent pH 5 Daily Grab Effluent Total Phosphorus mg/ L - Monthly Composite Effluent Total Phosphorus 6 Seasonal -Mass load of 53,543 lb April - October Calculated Effluent TKN Monthly Composite Effluent NO2 + NO3 Monthly Composite Effluent Total Nitrogen mg/ L Monthly; Calculated Effluent Total Nitrogen 6.7 Seasonal Mass load of 160,628 lb April - October Calculated Effluent Chronic Toxicity 8 Quarterly Composite Effluent Temperature 9 -. See Footnote 1 Grab Upstream & Downstream Dissolved Oxygen 3, . See Footnote 1 Grab Upstream & . Downstream Effluent Pollutant Scan 10 Annually Composite Effluent NOTES: See next page Permit NC0088366 NOTES for A.(2) 1. Upstream = at least 50 feet upstream of the discharge. Downstream = at least 500 feet from the discharge. Stream samples shall be collectedthree times per week during the months of June, July, August, and September and weekly during the remainder of the year. 2. The monthly average effluent BOD and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The daily average dissolved oxygen concentration as measuredin the effluent shall not be less than 5.0 mg/L. 4. TRC monitoring and limit requirements apply only if chlorine or chlorine derivative is used in the treatment process. If chlorine or chlorine derivative is used for disinfection, the Fayetteville Regional office must be notified in advance. The facilityshall report all effluent TRC values reported by a NC certified laboratory, including field 'certified. However, effluent values below 50 ug/ L will be treated as zero for compliance purposes. 5. The pH shall not be less than 6.0 standard units nor greater than.9.0 standard units. 6. Seasonal Mass limits for Total Phosphorus and Total Nitrogen represent the total pounds discharged during the time period beginning on April'1 through October 31 of each calendar year. 7. TN = TKN + NIo3-N + NO2-N where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and No3-N + NO2-N are Nitrate and Nitrite Nitrogen, respectively. 8. Chronic Toxicity (Ceriodaphnia) limit at 34% with testing in January, April, July, and October (see Special Condition A. (4)). 9. Instream sampling (Upstream and Downstream monitoring) • is waived as long as the. Permittee retains membership in the Middle Cape Fear River Basin Association (MCFRBA), which is conducting a coordinated instream monitoring effort. If the Permittee's membership in the MCFRBA is terminated, the Permittee must immediately notify the' Division in writing, and the instream monitoring requirements specified in this permit shall be reinstated immediately. 10. See Special Condition A.(6) There shall be no discharge of floating solids or visible foam in other than trace amounts. Permit NC0088366 A. (3) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 15%. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be performed during the months of January, April, July, and October. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. if the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Attention: NC DENR / DWQ / Environmental Sciences Section 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re- opened and modified to include alternate monitoring requirements or limits. If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring shall be included in the calculation and reporting of the data submitted on the DMR and all AT Forms submitted. Permit NC0088366 NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. A. (4) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) The effluent discharge shall. at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 34%. The permit holder shall perform at a minimum, quarterly monitoring using test procedures .outlined in the "North Carolina. Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised-February'1998) or subsequent versions. The tests will be performed during the months of January, April, July, and October. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. All toxicity testing results required as .part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Attention: NC DENR / DWQ / Environmental Sciences Section 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and- be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge, of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re- opened and modified to include alternate monitoring requirements or limits. Permit NC0088366 If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring shall be included in the calculation and reporting of the data submitted on the DMR and all AT Forms submitted. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall -constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. A. (5) PERMIT RE -OPENER: SUPPLEMENTARY NUTRIENT MONITORING Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in Title 15A of the North Carolina Administrative Code, Subchapter 02H, specifically, 15A NCAC 02H.0112(b)(1) and 02H.0114(a), and Part II, Sections B.12. and B.13. of this Permit, the Director of DWQ may reopen this permit to require supplemental nutrient monitoring of the discharge. The additional monitoring will be to support water quality modeling efforts within the Cape Fear River Basin, and shall be consistent with a monitoring plan developed jointly by the Division and affected stakeholders. s = i• Pemut NC0088366 A. (6) EFFLUENT POLLUTANT SCAN The permittee shall performan annual Effluent Pollutant Scan for all parameters listed in the table below (in accordance with 40 CFR Part. 136). The annual effluent pollutant scan samples shall represent seasonal (summer, winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Additionally, the method detection level and the minimum level shall be the most sensitive as provided by the appropriate analytical procedure. Ammonia (as N) Trans-1,2-dichloroethylene Bis (2-chloroethyl) ether Chlorine (total residual, TRC) 1,1-dichloroethylene Bis (2-chloroisopropyl) ether Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether Total Kjeldahl Nitrogen Ethylbenzene Butyl benzyl phthalate 0il and grease Methyl bromide 2-chloronaphthalene Total Phosphorus Methyl chloride . 4-chlorophenyl phenyl ether Total dissolved solids Methylene chloride Chrysene Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate Antimony Tetrachloroethylene Di-n-octyl phthalate Arsenic Toluene Dibenzo(a,h)anthracene Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene Chromium - Trichloroethylene 1,4-dichlorobenzene Copper Vinyl chloride 3,3-dichlorobenzidine -Lead Acid -extractable compounds: Diethyl phthalate Mercury - Method 1631E P-chloro-m-cresol Dimethyl phthalate Nickel 2-chlorophenol 2,4-dinitrotoluene Selenium 2,4-dichlorophenol 2,6-dinitrotoluene Silver 2,4-dimethylphenol 1,2-diphenylhydrazine Thallium 4,6-dinitro-o-cresol Fluoranthene Zinc 2,4-dinitrophenol Fluorene Cyanide 2-nitrophenol Hexachlorobenzene Total phenolic compounds 4-nitrophenol Hexachlorobutadiene Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene Acrolein Phenol Hexachloroethane Acrylonitrile 2,4,6-trichlorophenol lndeno(1,2,3-cd)pyrene Benzene Base -neutral compounds: Isophorone Bromoform Acenaphthene Naphthalene Carbon tetrachloride . Acenaphthylene Nitrobenzene Chlorobenzene Anthracene N-nitrosodi-n-propylamine Chlorodibromomethane . Benzidine N-nitrosodimethylamine Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine 2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene Chloroform . 3,4 benzofluoranthene Pyrene Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene 1,1-dichloroethane Benzo(k)fluoranthene 1,2-dichloroethane Bis (2-chloroethoxy) methane Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director, within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address: Division of Water Quality, 1617 Mail Service Center, Raleigh, North Carolina 27699- 1617. Priority Pollutant Analysis results shall be submitted with NPDES permit renewal applications.